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The pH at 25 °C of an aqueous solution of the sodium salt of p-cresol (NaC7H7O) is 11.60. Calculate the concentration of C7H7O- in this solution, in moles per liter. Ka for HC7H7O is equal to 6.7E-11.
The volume of a gas at 95.0 kPa is 300.0 mL. If the pressure is increased to 177 kPa, what will be the new volume?
How many moles of ethane (C2H6) would be needed to react with 62.3 grams of oxygen gas?
Calculate rate constant for 1. level reaction where 81% of the matters have already react after 27 seconds.
calculate (a)molality? (b)molarity of NaCl? (c) What is the mass/mass and remove the most loosely held e- from a gaseous atom in a ground state
If an automobile is able to travel 242 mi on 12.0 gal of gasoline, what is the gas mileage in km/L
60.0 mL of a 0.450 M solution is titrated with 0.570 M . Calculate the volume of required to reach the equivalence point.
The rate constant of some reactions double with every 10 degree rise in temperature. Assume that a reaction takes place at 295 K and 305 K. What must the activation energy be for the rate constant to double as described?
Why does the tetrahedral intermediate for carbxylic acid derivatives decompose into a carbonyl species
find the specific solubilities (in g/100g H2O) in both cold and hot water for AgCl, PbCl2, and Hg2Cl2.
What is the pH of a solution prepared by mixing 25.00 mL of 0.10 M methylamine, CH3NH2, with 25.00 mL of 0.10 M methylammonium chloride, CH3NH3Cl.
Calculate the amount of heat liberated (in kJ) from 355 g of mercury when it cools from 76.0°C to 13.0°C.
a 40 gram sample of water at 25 degrees celcius absorbs 500 joules of energy. what is the final temperature of the water? the specific heat of water is 4.18 joules/g degrees C.
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